Aboleth Spawn does the same thing for less mana, and flash means your opponents play into it more often
The last signature is from (Dark Master) Steven Kam
While sacrificing lands has its downsides, a Crucible of Worlds makes up for it, especially once you consider how much ramp Commander decks play
Levincia is primarily utilized in turbo decks that need to recover energy after using it to deal damage and knock out a Pokmon by discarding energy from the board or the hand
Pillar Analysis: High Power (Dual Land), Scarcity (Beta, Reserved List), Format Essential (Control Decks)
For example, if you attack with a 4/6 Wizard with trample and it's blocked by a 1/1 creature, you can assign 1 damage to the blocker and 3 damage to the defending player